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  • 09월 06일 15시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제112회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Comprehensive Analysis of Petroleum by Laser Desorption Ionization coupled to Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

2013년 9월 2일 13시 24분 19초
ANAL.O-3 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 10시 : 40분
분석화학 - Oral Presentation of Young Analytical Chemists
저자 및
조윤주, 김성환*
경북대학교 화학과, Korea
Many studies have analyzed the chemical composition of petroleum in order to better understand and predict the properties and behaviors of heavy petroleum. However, even using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), a complete understanding of the chemical composition of petroleum is not currently available. One of the problems limiting our knowledge is discrimination occurring during the ionization process. To circumvent this problem, it is beneficial to use as many ionization techniques as possible. Therefore, there have been many studies devoted to utilizing various ionization techniques, e.g., electrospray ionization (ESI), field desorption ionization, atmospheric pressure photo ionization (APPI), atmospheric pressure chemical ionization (APCI), easy ambient sonic-spray ionization mass spectrometry (EASI), laser-induced acoustic desorption (LIAD), and atmospheric pressure laser-induced acoustic desorption chemical ionization (AP/LIAD-CI) for oil research. Matrix-assisted laser desorption ionization (MALDI) is a widely used ionization method to analyze biomolecules and polymers. MALDI is limited for the analysis of oils because peaks originating from the matrix are abundant at m/z < 500, where many compounds in oil are observed. Therefore, laser desorption ionization (LDI) has been used instead of MALDI to study petroleum. In this study, (+) and (-) mode LDI FT-ICR MS spectra obtained from crude oils have been compared and shown that LDI can be a useful technique to study crude oil. Heavy components of oils contain aromatic ring structures were successfully analyzed because they can absorb laser photons efficiently. For shale oils derived from different source rocks, the comparison results of characterization using (+) mode APPI and LDI FT-ICR MS have shown that LDI is sensitive toward nitrogen class compounds and can be a good method for the analysis of oil shale extracts. Moreover, vanadyl- and nickel porphyrin complexes in crude oils were detected more effectively by LDI than APPI FT-ICR MS directly from an unfractionated crude oil.